GroMoPo Metadata for Dusseldorf SPRING model

The application of the groundwater flow model SPRING to the city of Dusseldorf, Germany (217 km(2)) as part of a larger hydrological catchment area (708 km(2)) required developing a new, robust calculation scheme (RUBINFLUX) for groundwater recharge with a high spatial and temporal resolution. RUBINFLUX combines a novel approach for drainage from the unsaturated zone with proven hydrological components. The drainage is calculated as a natural exponential function using the difference between the actual storage and the water storage at field capacity without making use of the Richards equation. The simulated groundwater recharge values at each element of the groundwater mesh were used as the upper boundary condition. After transient calibration of the groundwater flow model against 871 observation wells, the transient variations of the groundwater levels at locations not influenced by river levels were accurately simulated. The integration of RUBINFLUX into SPRING has proved suitable for complex hydrological systems.

将地下水流模型SPRING应用于德国杜塞尔多夫市（面积217 km²），作为面积708 km²的更大尺度水文流域的组成部分时，需开发一种兼具新颖性与鲁棒性、且具备高时空分辨率的地下水补给计算方案RUBINFLUX。RUBINFLUX将一种非饱和带排水的创新方法与成熟的水文计算组分相结合，其求解过程无需借助理查兹方程(Richards equation)，而是通过实际储水量与田间持水量下的储水量差值，以自然指数函数形式计算排水量。研究将地下水网格各单元的模拟地下水补给值作为模型的上边界条件。在基于871口观测井完成地下水流模型的瞬态校准后，未受河流水位影响区域的地下水位瞬态变化得以精准模拟。将RUBINFLUX集成至SPRING的方案已被证实可适用于复杂水文系统。